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| 1 | Impact of China’s Air Pollution Prevention and Control Action Plan on PM2.5 chemical composition over eastern China显示文摘China promulgated the Air Pollution Prevention and Control Action Plan(the Action Plan)in 2013 and developed stringent control measures to mitigate fine particulate matter(PM2.5) pollution.Here,we investigated the PM2.5 chemical composition changes over eastern China associated with the Action Plan during 2013-2017 using satellite-based PM2.5 chemical composition data derived using CMAQ simulations and satellite inputs.The PM2.5 concentrations decreased considerably during this time as a result of the reductions in all chemical species in PM2.5.The population-weighted mean concentrations over eastern China decreased from 11.1 to 6.7μgm-3 for SO42-,13.8-13.1μgm-3 for NO3-,7.4-5.8μgm-3 for NH4+,9.9-8.4μgm-3 for OM,4.6-3.8μg m-3 for BC and 12.9-9.6μg m-3 for other species in PM2.5.SO42-had the largest reduction of 40%,while NO3-had the lowest reduction of 5%,resulting in a greater fraction of NO3-and a smaller fraction of SO42-in PM2.5.Among the three key regions,Beijing-Tianjin-Hebei had the largest reduction in PM2.5 and its chemical compositions.The decrease in SO42-concentrations was in line with the reduction of SO2 emissions,and the major driver of the SO2 emission reductions was the industrial sector.The decrease in NO3 concentrations was limited because the decrease in SO2 emissions and the stable NH3 emissions facilitated the formation of NO3-from HNO3,which partially offset the reduction in NOx emissions driven by the power sector.To mitigate PM2.5 pollution more effectively,future efforts are needed to reduce NH3 emissions. | Guannan GENG Qingyang XIAO Yixuan ZHENG Dan TONG Yuxuan ZHANG Xiaoye ZHANG Qiang ZHANG Kebin HE Yang LIU | 2019 | Science China Earth Sciences2019，62，12： | 16 |
| 2 | Novel roll effector based on zero-mass-flux dual synthetic jets and its flight test显示文摘The autonomous and controllable Dual Synthetic Jet Actuator(DSJA)is firstly integrated into the Unmanned Aerial Vehicle(UAV),and flight tests without the deflection of rudders are carried out to verify the viability of DSJA to control the attitudes of UAV during cruising.DSJA is improved into an actuator with two diaphragms and three cavities,which has higher energy levels.Actuators,differentially distributed on both sides of the wings,are installed on the trailing edge close to the wing tips.Flight tests,containing Differential Circulation Control(DCC)using double-side actuators,Positive Circulation Control(PCC)using left-side actuators and Negative Circulation Control(NCC)using right-side actuators,are implemented at cruising speed of 25 m/s.Results show that roll attitude control without rudders could be realized by DSJAs.DCC and NCC can generate the rightward roll and yaw angular velocity,prompting UAV to turn right.The stronger controlling ability can be achieved by DCC,with the maximum roll angular velocity of 15.62(°)/s.PCC can generate a rightward roll moment,but a leftward yaw moment will be produced at the same time.Leftward yaw induces the leftward rolling moment,which weakens the roll control effect,making UAV keep to yaw to the left with a small slope. | Zhenbing LUO Zhijie ZHAO Jiefu LIU Xiong DENG Mu ZHENG Hang YANG Qingyang CHEN Shiqing LI | 2022 | Chinese Journal of Aeronautics2022，35，8： | 7 |
| 3 | Technical Perspective of Carbon Capture,Utilization,and Storage显示文摘Carbon dioxide(CO_(2))is the primary greenhouse gas contributing to anthropogenic climate change which is associated with human activities.The majority of CO_(2) emissions are results of the burning of fossil fuels for energy,as well as industrial processes such as steel and cement production.Carbon capture,utilization,and storage(CCUS)is a sustainable technology promising in terms of reducing CO_(2) emissions that would otherwise contribute to climate change.From this perspective,the discussion on carbon capture focuses on chemical absorption technology,primarily due to its commercialization potential.The CO_(2) absorptive capacity and absorption rate of various chemical solvents have been summarized.The carbon utilization focuses on electrochemical conversion routes converting CO_(2) into potentially valuable chemicals which have received particular attention in recent years.The Faradaic conversion efficiencies for various CO_(2) reduction products are used to describe efficiency improvements.For carbon storage,successful deployment relies on a better understanding of fluid mechanics,geomechanics,and reactive transport,which are discussed in details. | Qingyang Lin Xiao Zhang Tao Wang Chenghang Zheng Xiang Gao | 2022 | Engineering2022，8，7： | 6 |
| 4 | New WHO global air quality guidelines help prevent premature deaths in China显示文摘The air quality guidelines (AQGs) issued by the World Health Organization (WHO) in 2005 are key references for the National Ambient Air Quality Standards (NAAQSs) in China.On 22September 2021,the WHO issued new AQGs (NAQGs)[1],which propose more stringent targets to control exposure to multiple air pollutants,including fine particulate matter (PM_(2.5)) and ozone (O_(3)),to which,in 2019,451 million premature deaths,globally,were attributable [2]. | Tao Xue Guannan Geng Xia Meng Qingyang Xiao Yixuan Zheng Jicheng Gong Jun Liu Wei Wan Qiang Zhang Haidong Kan Shiqiu Zhang Tong Zhu | 2022 | National Science Review2022，9，4： | 3 |
| 5 | Effects of phenanthrene on hepatic enzymatic activities in tilapia(Oreochromis niloticus ♀×O.aureus ♂)显示文摘The effects of phenanthrene(Phe) on hepatosomatic index(HSI) and hepatic enzymatic activities in hybrid tilapia(Oreochromis niloticus ♀× O.aureus ♂) were investigated via the static freshwater exposure at dosage of 50,100,and 400 μg/L for 4-14 d.Compared with the control group,HSI was significantly decreased(P < 0.05) at 400 μg/L at day 14.Increased enzymatic activities(P < 0.05) were observed for catalase(CAT),glutathione peroxidase(GPx) and superoxide dismutase(SOD) at either 100 or 400 μg/L at day 8 and 14,as well as for CAT at 50 μg/L at day 14,except for GPx at 400 μg/L at day 8.Ethoxyresorufin O-deethylase(EROD) activity was significantly increased(P < 0.05) at all dosage at day 4 as well as at 50 μg/L at day 8,but significantly decreased at either 100 or 400 μg/L at day 14(P < 0.05).Glutathione-S-transferase(GST) activity was not affected.The results suggest that CAT,GPx,SOD and EROD,as well as HSI in tilapia may be used as the biomarkers or indexes for evaluating or monitoring the pollution of polycyclic aromatic hydrocarbons(PAHs) such as Phe. | XU Wenju LI Yuanyou WU Qingyang WANG Shuqi ZHENG Huaiping LIU Wenhua | 2009 | Journal of Environmental Sciences2009，21，6： | 1 |
| 6 | Dynamics response analysis of airborne external storage system with clearance between missile-frame显示文摘Considering the aircraft and its external components are subjected to complex and variable aerodynamic loads during the working process,the missile-frame clearance system of the airborne external missile is investigated.The random vibration characteristics of the airborne external components are analyzed by finite element method.The finite element model is optimized with reference to the test results,and the effects of different clearance on the dynamic response of the missile-frame system are compared.The result shows that the frequency response curves of the same position and the resonant peak frequencies are consistent under different clearances.The acceleration response at both ends of the missile is large and the amplitude near the center of mass is gentle.The results can be used to predict reasonable missile-frame clearance and make guidance to the structural design and reliability analysis of the missile-frame system. | Yongfeng YANG Qingyang ZHENG Jianjun WANG Zhongfu MA Xiangqiu LIU | 2020 | Chinese Journal of Aeronautics2020，33，12： | 1 |
| 7 | Numerical Investigation of the Influence of Fuel Concentration Gradient on Propane/Oxygen Detonation Propagation显示文摘In this paper,one-and two-dimensional numerical simulations are carried out to study the effects of fuel concentration gradients(such as steep,intermediate and shallow)on the detonation wave behavior.The equivalent ratio range of detonation propagation,the quenching mechanism and the change of cell size are discussed in detail.The simulation results show,as the fuel concentration gradient increases,the detonation wavefront decays faster and decouples into a leading shock and a following flame at equivalence ratios of 0.68,0.64 and 0.62,respectively.Moreover,there are two modes of the quenching mechanism.One occurs in the steep gradient that the detonation wave fails rapidly.The O_(2)in front of the detonation wave passes through the detonation wave and forms some unburned O_(2)pockets.The unburned pockets are affected by the marginal walls and reduce the heat release.The other occurs in the intermediate and shallow gradients that more triple points will survive in the flow field,which leads to a difference in the propagation speed of the detonation wavefront.This makes the detonation wavefront bent and deformed.The unburned O_(2)pockets are affected by the strong instability near the triple points and show different distribution characteristics compared with the steep gradient,which may be helpful to the detonation propagation.In addition,as the fuel concentration gradient increases,the triple points moving toward the wall gradually disappear while the triple points that move toward the center can continue to survive,which leads to the gradual increase in cell size and irregularity of the cell structure. | SHAO Xiaofeng WU Tianxing MENG Qingyang ZHAO Ningbo QI Lei ZHENG Hongtao | 2023 | Journal of Thermal Science2023，32，6： | 0 |
| 8 | A systematic printability study of direct ink writing towards high-resolution rapid manufacturing显示文摘Direct ink writing(DIW)holds enormous potential in fabricating multiscale and multi-functional architectures by virtue of its wide range of printable materials,simple operation,and ease of rapid prototyping.Although it is well known that ink rheology and processing parameters have a direct impact on the resolution and shape of the printed objects,the underlying mechanisms of these key factors on the printability and quality of DIW technique remain poorly understood.To tackle this issue,we systematically analyzed the printability and quality through extrusion mechanism modeling and experimental validating.Hybrid non-Newtonian fluid inks were first prepared,and their rheological properties were measured.Then,finite element analysis of the whole DIW process was conducted to reveal the flow dynamics of these inks.The obtained optimal process parameters(ink rheology,applied pressure,printing speed,etc)were also validated by experiments where high-resolution(<100μm)patterns were fabricated rapidly(>70 mm s^(-1)).Finally,as a process research demonstration,we printed a series of microstructures and circuit systems with hybrid inks and silver inks,showing the suitability of the printable process parameters.This study provides a strong quantitative illustration of the use of DIW for the high-speed preparation of high-resolution,high-precision samples. | Qingyang Zheng Bin Xie Zhoulong Xu Hao Wu | 2023 | International Journal of Extreme Manufacturing2023，5，3： | 0 |
| 9 | Pancreatic head cancer with gastrointestinal bleeding as the initial manifestation:a case report and literature review显示文摘Gastrointestinal bleeding(GIB)as the initial symptom is rare in patients with pancreatic cancer,which is prone to misdiagnosis and should be paid attention to by clinicians.Here,we present a patient with pancreatic head cancer whose first symptom was only severe upper gastrointestinal bleeding,which initially led to misdiagnosis.However,subsequent imaging revealed a mass in the pancreatic head which was considered a malignant tumor.After surgical resection,the pathology confirmed that the mass in the pancreatic head was pancreatic ductal adenocarcinoma,and the duodenal bulb’s full thickness was infiltrated.A literature review found that pancreatic cancer can present gastrointestinal bleeding by invading the digestive tract and blood vessels,left-sided portal hypertension(LSPH),digestive tract metastasis,and canceration of ectopic pancreatic tissue in the digestive tract.For these cases,clinicians should utilize multidisciplinary diagnosis and treatment based on digestive endoscopy,imaging,interventional therapy,and surgery to control bleeding,identify etiology,and remove tumors. | Minghui Zheng Zhiping Fu Ting Niu Anan Liu Danlei Chen Junfeng Peng Judong Li Zhiyuan Hao Qingyang Yu Zechao Lyu Chenghao Shao | 2023 | Journal of Pancreatology2023，6，3： | 0 |
| 10 | Physical clogging experiment of sand gravel infiltration with Yellow River water in the Yufuhe River channel of Jinan, China显示文摘To make sense of physical clogging during Yellow River water spreading in the strong leakage zone of the Yufuhe River,a laboratory sand column experiment was undertaken and the heterogeneous sand gravel with a uniformity coefficient of 25.2 from the Yufuhe River was used as an infiltration medium.Under either the condition of raw sand or washed sand,physical clogging tests were conducted with constant hydraulic heads of 10 cm and 30 cm and inflow suspension concentrations of 200 mg/L,500 mg/L,and 1000 mg/L.The fine particles in the suspension and in the raw sand were considered exogenous and endogenous particles,respectively.Rapid clogging was observed in the porous medium when the inflow concentrations of the exogenous particles were high,and increased hydraulic head led to serious clogging.This result indicated that the Yufuhe River has a strong recharge capability with respect to clogging.The analysis of particle content shows that endogenous fine particles(diameter 1–10 mm and 50–74 mm)had less mobility and generally accumulated in the sand column,whereas particles with diameter 10–50 mm had greater mobility in the sand column.And the distribution of exogenous fine particles size after movement is relatively uniform in the sand column.Field observations indicated that the filtration effect of the aquifers have greatly improved the water quality of recharge water in the strong leakage zone of the Yufuhe River,and test data of turbidity also verified the results of the sand column experiments. | Qingyang ZHENG Weiping WANG Shuai LIU Shisong QU | 2020 | Frontiers of Earth Science2020，14，2： | 0 |
| 11 | Membrane dual-targeting probes:A promising strategy for fluorescence-guided prostate cancer surgery and lymph node metastases detection显示文摘Fluorescence-guided surgery(FGS)with tumor-targeted imaging agents,particularly those using the near-infrared wavelength,has emerged as a real-time technique to highlight the tumor location and margins during a surgical procedure.For accurate visualization of prostate cancer(PCa)boundary and lymphatic metastasis,we developed a new approach involving an efficient self-quenched near-infrared fluorescence probe,Cy-KUE-OA,with dual PCa-membrane affinity.Cy-KUE-OA specifically targeted the prostate-specific membrane antigen(PSMA),anchored into the phospholipids of the cell membrane of PCa cells and consequently showed a strong Cy7-de-quenching effect.This dual–membrane-targeting probe allowed us to detect PSMA-expressing PCa cells both in vitro and in vivo and enabled clear visualization of the tumor boundary during fluorescence-guided laparoscopic surgery in PCa mouse models.Furthermore,the high PCa preference of Cy-KUE-OA was confirmed on surgically resected patient specimens of healthy tissues,PCa,and lymph node metastases.Taken together,our results serve as a bridge between preclinical and clinical research in FGS of PCa and lay a solid foundation for further clinical research. | Ling-Ling Wu Qinxin Zhao Qinghua Wang Qingyang Zhang Feiya Yang Bo Zheng Hai-Yu Hu Nianzeng Xing | 2023 | Acta Pharmaceutica Sinica B2023，13，3： | 0 |
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